/Engine/Source/Editor/LandscapeEditor/Public/LandscapeImportHelper.h
If the operation was a Success/Error/Warning.
static ELandscapeImportResult GetWeightmapImportDescriptor ( const [FString](API\Runtime\Core\Containers\FString) & FilePath, bool bSingleFile, bool bFlipYAxis, [FName](API\Runtime\Core\UObject\FName) LayerName, [FLandscapeImportDescriptor](API\Editor\LandscapeEditor\FLandscapeImportDescriptor) & OutImportDescriptor, [FText](API\Runtime\Core\Internationalization\FText) & OutMessage )